The most important functions: Contributes to the normal function of the immune system (vitamin D, vitamin C, vitamin B9) Contributes to the maintenance of normal bones (vitamin K, zinc) Contributes to the normal functioning of the nervous system (vitamin B1, vitamin B2) Contributes to normal energy metabolism (vitamin B1, vitamin B2, iodine) Contributes to the reduction of tiredness and fatigue (vitamin B2, vitamin B12) Contributes to normal cognitive function (iodine) Helps protect cells from oxidative stress (vitamin C) During a child's growth and development, an adequate supply of vitamins and minerals is really important. Children often have certain preferences and only like specific foods. A healthy diet for children is therefore quite challenging. Consequently, it can happen that not all necessary nutrients are covered by their diet.